I'm sorry Flatbread, you are wrong. My 'dogs' plural do not have dog aggression. One of my dogs is dog aggressive, he is a rescue dog and has all sorts of issues due to his dreadful start in life. However, there have been huge improvements in him in the time we have had him. He was also aggressive towards humans when we got him, he no longer is, but I doubt he will ever be totally comfortable around people he doesn't know. He is the very sad product of what hitting a dog as a punishment and not socialising them can do, as well as puppy farming. He can also be food aggressive with the other dogs, although not with me, again, as a result of his very poor start in life where he literally had to fight other dogs for his food in order to survive.
Taking on a rescue dog with a lot of very serious issues is very different to bringing up a dog from a puppy or taking in an older but fairly well adjusted dog. If anyone were to ever hit him again, now he is rather large and rather strong, I doubt he would react well to it, and why should he, quite frankly?
However, none of my dogs have ever done anything to warrant a 'tap on the bum' (a smack, that's what it is, lets not beat about the bush!) and are well adjusted, well behaved dogs, even the rescue one is in most ways. He's certainly well trained!
However, anecdotal evidence of our own dogs aside, the OP clearly has a problem as her dog has felt the need to resort to a bite, one that could have been prevented, so something has gone wrong somewhere.
I have to say, having close relatives who live in rural France and having seen in your own words how dogs are treated there, their animal welfare standards are not something I aspire to.